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A follow-up to the 2001 award-winning show "The Blue Planet," this natural history series sees Sir David Attenborough return as narrator and host. A breathtaking exploration of the world's vast oceans, hourlong episodes capture animals and other living organisms in their natural habitat, presenting viewers with a fascinating insight into what life is like underwater. From tropical seas to the harsh conditions of the Arctic, the makers of "Blue Planet II" use modern filming equipment and techniques to shine a light on areas of the planet that humans have never seen before.

Aquatic ecologist Zeb Hogan gets up close and personal with bizarre giants of the water, specimens equally enormous in proportion and odd in appearance. Among other adventures, Hogan investigates flying fish from Asia that are invading America's waterways, and he searches for one of North America's toothiest and most-misunderstood monster fish, the alligator gar. Some of the species Hogan encounters have survived for centuries but now face the threat of extinction, and he presents groundbreaking research undertaken to protect them.

English naturalist Chris Packham explores some of the strangest natural events to be caught on camera in this docuseries. Assisted by scientists and experiments, Packham explores the secrets behind bizarre science, crazy weather and medical marvels. Using footage taken by eyewitnesses and news crews, the host attempts to decipher the truth behind each scene. Some of the incidents under scrutiny are unusual animal friendships, towns under the siege of thousands of flying insects and extraordinary mating calls that have kept people awake at night.

Andy Coetzee has navigated the oceans in an attempt to reel in the world's largest and most elusive fish. Viewers watch as Coetzee braves one of the most treacherous rivers on the planet, dive into the predatory waters of Western Africa, and enter uncharted regions of the Indian Ocean as he seeks the Nile perch, the giant barracuda, and the dogtooth tuna. Coetzee has made it his mission to do whatever it takes --no matter how dangerous-- to catch these great giants.